Brigk-press



I TED srATEs PgrENr onirica.;

JosEE JOHNSON, or FORT surrn ARKANSAS.

BRICK-PRESS.

, Specication of LettersPatent N o. 11,482, datedgAugust 8l, 1854.

To all 107mm t may concern.' J

` Be it knownlthat I, Josua JoHNsoN.` of` Fort Smith, county of Sebastian, and ASta-te of Arkansas, have invented certain new and useful` Improvements in Machines for Manufacturing Brick; and I do hereby `de- Clare` the following tobe `a full,` clear, and exact description of the same, reference beforming` part of this specification.

Figure 1- represents` aside elevation of my Fig. 2 is a h0ri`` improved` press' complete.` zontal section taken through the line m m of Fig. l; showing the construction and operation for the mechanism for molding the brick. F 3 is a*V crss section of one of the` .hoppers hereinafter referred to, showing the plunger` orsliding head in position, previous tof the operation of pressing the clay intothe mold, and1 also representing a `fragment 0f the mainhopper attached thereto; Fig. 4 is a correspondingseetion of the same, show ing the position of the sliding head and "mold after the brick have been cast. Fig. 5

is a side elevation of the mold and Fig. 6,

isl atlse a side elevation of thecut-off.

To enable others skilled in the art to InakeandV use my improved press, I will proceed toa desription of the same in detail.

(A) represents the frame, constructed and arranged in any convenient manner, and mounted upon wheels (c) for the purpose of conveying said machine with facility to any desired location.

(B) represents the hopper or clay-bed in which the clay is prepared previous to molding the brick. Said hopper is of cylindrical form and may be constructed of any material found advisable.

(D) is the main shaft, supported by cross ties (f) and extends to the lower part of the machine. Upon this shaft the arms for the purpose of grinding and mixing the clay are placed. Attaching arms to a shaft for the purpose of tempering the clay is an old and well known device. A detailed description therefore is deemed unnecessary here.

Upon the upper end of the main shaft (D) is firmly secured Va lever or sweep (E) by which the mechanism for tempering the cla and molding the brick is actuated.

F) are four hoppers, placed on the four opposite sides of thefframe and directly beneath the main hopper (B),

3. Thesehoppers are provided with plungers or sliding heads (71.) and are operated .levers (K) as Seen in Fig.`

in thefollowing manner: (a) represent double cams, `.secured to the inner extremity of and attached to the sliding heads (/zl), by connecting rods (c), Figs. 3 and 4, also represented by dotted lines in Fig. 2. On the lower extremity of the shaft (D) are placed two cross-heads and (n), as shown in red lines in F ig. 2. Near the opposite ends, and on the lower surface of the cross head (on), are placed two friction rollers "(1', n) represented by blue lines. The cross-head being firmly secured tothe shaft (D) rotates therewith, causing the friction rollers (r r) to' be brought into contact with the .outer cams or curved surfaces (z') of the double cams (a), the same being secured to the levers (K), which levers are pivoted at their opposite ends to the frame (A), thus causin` by the rotation of the shaft (D), the sli infr heads (it) which are securedjto the cams a) by connecting rods (c) tobe drawn toward the center in order that the lioppers may receive a fresh supplyof prepared clay from the main hopper above. The cross-head (n) which is se# cured to the shaft (D), is placed at right angilesjo the cross-head and is also furnishedwith friction rollers (s, 8,) shown in blue lines.l These rollers operate on the inner cams or curved surfaces (o) of the cams (e).V Thus it will be seen that lby drawing alternately the sliding heads (71.) toward the center of the machine, by the friction rollers (r r), in order that the hoppers may be refilled with clay from the main hopper (B), and causing the same to be forced to their eXtreme positions by the friction rollers (s s) secured to the crosshead (n), the operation of receiving the clay and molding the brick is effected with rapidity and precision.

(P) represents a gate which supports the mold (u) and is pivoted at its lower side to the frame This gate being hinged at (Z) is opened when the sliding head (7L) is drawn back, as seen at Fig. 3, in order that the mold (u) may be changed. After the brick have been removed and the mold replaced by another, the gate is thrown up and locked in position, as seen in Fig. 4, in readiness to receive and mold the fresh clay forced into the mold (u) by the sliding head (It). During the process of removing the brick from the mold, the hopper (F) is being filled with prepared clay from the main hopper (B), as shown at Fig. 3.

y This cutoif is pivoted at its lower side to a lever (J), the fulcrum of which is supported in a cross-bar (N) Fig. l. From the fulcrum this lever assulnes nearly a horizontal position, as shown inv dotted lines,I forming what is commonly termed a bellcrank. To operate this crank, the upper end is extended from the angle (w) perpendicularly, a sufcient distance to be operated upon by the friction wheel (p) secured to the lower side of the sweep (E). That the cut-offl (I) may be replaced in its proper positionA to admit through its orifces (m, x,) corresponding with the mold the clay forced forward by the sliding head- (b), I have arranged a second lever (w) which is likewise secured to the cross-bar (N) by a pivot (g). The upper extremity of this lever, previous the clay, assumes an inclined position, while Athe lower end thereof extending from the fulcrum (g) forms an obtuse angle and rests' against the lower side of the lever (J) as shown by dotted lines. It will therefore be readily understood that by rotating the sweep (E) the friction rollers (p) secured to its lower surface will be brought in contact with the upper end of the lever (J) causing the same to be forced in the direction indicated by the arrow. By depressing to the separation ofthe lever (J), thelever (w) is caused by its lower bent end being in Contact with the lever (J), to assume a perpendicular position, in which position, its upper extremity extends somewhat above that of the lever (J), so that as the friction roller (p) passes over the lever (J), causing the cut-off (I) i to perform its stroke, the lever by the friction roller in its turn is forced to its original position in readiness for a repetition ofthe above described. operation.

It will be observed that by placing mech# anism on the four sides of the frame, the

two opposite molds will be operated simultaneously. In order therefore that the re; spective cut-offs shall correspond in motion to the several molds, I have placed corre-- sponding friction rollers von Athe ,lower .surface of the sweep (E), causing the two opposite cut-offsfto perform their functions simultaneously and in quick succession after the clay has been pressed into the mold.

What I claim and desire to secure by Letters Patent, is-

l. I do claim the combination of the double cam or cams a at the end of the lever or levers K and attached to and acting upon tially as and for the purpose above set forth and described.

2. I further claim, for the purpose of operating the cut-off, the combination of the two levers J and w with the friction wheels.'

p or their `equivalents at the end of the sweep E, as set forth and described.

Witnesses:

SAML. GRUBB, F. D. CLEARY, IVM. D. ACKER.

Josnn JoHNsoN, 

